機器
air
appliance
clean
cleaner
cleaning
coil
cold
condition
conditioner
conditioning
dirty
dust
dusty
electric
electrician
equipment
filter
fix
fixing
gloves
hand
heat
home
hot
house
indoor
installation
installing
job
maintenance
man
office
professional
remove
repair
repairing
replace
replacement
service
system
technician
temperature
unhealthy
unit
wall
wash
washing
work
working